// CaseInput.h -------------------------------------------------
...
private:        // User declarations
  int Case_flag;  // 0: 앞면, 1: 뒷면
  int ROI_flag1, ROI_flag2, ROI_flag3;  // 선택영역 내부인지
  bool IsDrawing;

  double STX, STY;   // 영역 확대율
  int StartX[3];
  int StartY[3];
  int EndX[3];
  int EndY[3];
...

// CaseInout.cpp -----------------------------------------------

...
void __fastcall TFormCaseInput::Shape1MouseUp(TObject *Sender,
      TMouseButton Button, TShiftState Shift, int X, int Y)
{
...
    StartX[0] = Shape1->Left;    // 여기서 에러: Undefined Symbol 'StartX'
    StartY[0] = Shape1->Top;
    EndX[0] = Shape1->Width+StartX[0];
    EndY[0] = Shape1->Height+StartY[0];
}